Experimental results.—
Figure REF  shows the experimental setup of DPMPC. A Yb:KGW laser (Carbide, Light Conversion) delivers 190 fs, 187 \(\mu \) J pulses at 100 kHz repetition rate and 1030 nm central wavelength. A concave mirror M1 (f = 50 cm) focuses the beam onto a 200-\(\mu \) m-thick quartz plate to initiate the spectral broadening process, where the peak intensity is estimated to be 6.52 TW/cm\(^{2}\) . Two subsequent quartz plates with the same thickness are inserted behind the self-focused position from the previous plate, such that maximal broadening can be achieved while no damage is observed [1]}. These three plates form “Zone A”, after which no spectral broadening is observed by adding additional plates [dashed, Fig. 2 (a)].
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